// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "media/audio/fake_audio_output_stream.h"

#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/logging.h"
#include "base/single_thread_task_runner.h"
#include "base/time/time.h"
#include "media/audio/audio_manager_base.h"

namespace media {

// static
AudioOutputStream* FakeAudioOutputStream::MakeFakeStream(
    AudioManagerBase* manager, const AudioParameters& params)
{
    return new FakeAudioOutputStream(manager, params);
}

FakeAudioOutputStream::FakeAudioOutputStream(AudioManagerBase* manager,
    const AudioParameters& params)
    : audio_manager_(manager)
    , callback_(NULL)
    , fake_worker_(manager->GetWorkerTaskRunner(), params)
    , audio_bus_(AudioBus::Create(params))
{
}

FakeAudioOutputStream::~FakeAudioOutputStream()
{
    DCHECK(!callback_);
}

bool FakeAudioOutputStream::Open()
{
    DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
    audio_bus_->Zero();
    return true;
}

void FakeAudioOutputStream::Start(AudioSourceCallback* callback)
{
    DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
    callback_ = callback;
    fake_worker_.Start(base::Bind(
        &FakeAudioOutputStream::CallOnMoreData, base::Unretained(this)));
}

void FakeAudioOutputStream::Stop()
{
    DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
    fake_worker_.Stop();
    callback_ = NULL;
}

void FakeAudioOutputStream::Close()
{
    DCHECK(!callback_);
    DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
    audio_manager_->ReleaseOutputStream(this);
}

void FakeAudioOutputStream::SetVolume(double volume) { }

void FakeAudioOutputStream::GetVolume(double* volume)
{
    *volume = 0;
}

void FakeAudioOutputStream::CallOnMoreData()
{
    DCHECK(audio_manager_->GetWorkerTaskRunner()->BelongsToCurrentThread());
    callback_->OnMoreData(base::TimeDelta(), base::TimeTicks::Now(), 0,
        audio_bus_.get());
}

} // namespace media
